MP3309GQG-Z

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MP3309GQG-Z is a high-efficiency and high level integrated DC/DC converter for LED driving applications. Its internal topology consists of a fixed frequency current-mode controlled boost converter, which integrates high-side current sense and low-side Mosfet switches. It supports a wide input voltage range of 4V to 40V, and an adjustable output voltage range of 2V and 40V. The output current range of MP3309GQG-Z is up to 350mA, ideal for driving various LED strings. The device integrates state-of-the-art features such as cycle-by-cycle current limit, independent LED open-short detection and LED dimming control via PWM signal for smooth dimming of LED lights. Its operation frequency is programmable from 250kHz to 1.3MHz. External components are minimized by tight regulation of output voltage and current. On-chip feedback resistor is trimmed for best accuracy and efficiency, allowing more design flexibility.

The primary advantages of MP3309GQG-Z are its high efficiency, current-mode control, and tight voltage and current regulation. The on-chip feedback resistor allows the use of a current source to protect the output, minimizing external components. The cycle-by-cycle current limit feature allows over current protection when the inductor current limit is exceeded. The external current sensing scheme allows accurate current regulation of the output and improved efficiency by eliminating the losses associated with the on-chip current sensing. The on-chip synchronous Mosfet further improves efficiency by limiting conduction losses.

In applications where dimming is also required, the device’s integrated PWM dimming control capability allows external control of the output current. The PWM dimming range is adjustable for different applications, allowing for gradual dimming control. The device also features integrated open-short detection for more reliable operation. It can detect open-circuit and short-circuit conditions and adjust the output accordingly.

MP3309GQG-Z is a high-efficiency and high-performance LED driver suitable for many applications, including automotive, backlighting, and industrial lighting. With its current-mode control and adjustable output voltage and current, it provides great flexibility for system designers. Its high efficiency and integrated features make it an ideal choice for LED driving applications.

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